Cisco ASR 920 series Configuration Guide Ethernet Router

Rewrite Configuration Model for 802.1ad Ports
The table describes the rewrite configuration supported on service instances for the C-UNI, S-UNI and NNI
ports
Egress DirectionIngress DirectionRewritePort
Bridge Domain
Not supportedSupportedPushC-UNI
S-UNI
Not supportedSupportedPopNNI
SupportedNot supportedPush
Trunk EFP
SupportedSupportedPopC-UNI
NANANAS-UNI
Not supportedSupportedPopNNI
SupportedNot supportedPush
Cross Connect
Not supportedSupportedPushC-UNI
S-UNI
NANANANNI
Information About 802.1ad
802.1ad Ports
In 802.1ad, a port is configured as either a customer user-network interface (C-UNI), a service-provider UNI
(S-UNI), or a network-to-network interface (NNI). Only Layer 2 interfaces can be 802.1ad ports.
• C-UNI—an be either an access port or an 802.1Q trunk port. The port uses the customer bridge addresses.
To configure a C-UNI port, enter the ethernet dot1ad uni c-port interface configuration command.
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
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Configuring IEEE 802.1ad
Rewrite Configuration Model for 802.1ad Ports

Cisco ASR 920 series Specifications

General

Form Factor	1RU
Operating System	Cisco IOS XE
Model	ASR 920 series
Memory	4 GB DRAM
Power Supply	AC or DC
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Relative Humidity	5% to 95% non-condensing
MTBF	Varies by model
Management	CLI, SNMP